Put a stop to spam with Zero Spam.

The most up-to-date IP, username & email blacklist database.

We have one of the largest, most comprehensive, and up-to-date IP, username, and email blacklist databases available. Our global detection network of over 30,000 apps and sites monitor traffic, usage, then reports malicious access attempts and submissions in real-time.

Zero Spam

Over 491,293 attacks blocked on over 3,716 sites.


It’s easy to integrate Zero Spam into any website or application. Check out our installation guide for more information.

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Search our database of reported spammy and malicious IP addresses, usernames, and emails.

Frequently Asked Questions

Find answers to common questions about Zero Spam’s IP blacklist below. Can’t find your question? Contact us.

Of course! But don't take our word for it. Do your own research on our detection and blocking success rates. Every site is different, but on average, we're seeing about a 96.8% decrease in spam and malicious attempts when using Zero Spam.

Zero Spam uses numerous and regularly updated spam & malicious detection techniques like Honeypot, IP history, and more including our own AI-powered Zero Spam Confidence Score to detect and stop these attacks before they begin.